南瓜饼

摘要： my2.h#import <Foundation/Foundation.h>//委托@protocol playerDelegate<NSObject>-(void)upatemethod:(NSString *)str;@end@interface my2 : NSObject@endmy1.h#import <Foundation/Foundation.h>#import "my2.h"@interface my1 : NSObject<playerDelegate>-(void)mypp;@endmy2.m#import 阅读全文

摘要： 单例设计模式//单例public class Student { private Student(){} private static Student instance = new Student(); public Student getInstance() { return instance; }}组合设计模式//组合public class Coder { private Computer com; public Coder(Computer com) { this.com = com; }}public class ... 阅读全文